Grade level norms were developed, based on a sample of 678 elementary school students, for various error scores of the Benton Visual Retention Test. Norms were also developed for 201 normal children, 58 minimal brain dysfunction children, and 101 educable mentally retarded children. In both the copying mode and the memory mode, most errors were categorized as distortion; the next most frequently occuring errors were omissions in the memory mode. The educable mentally retarded children made more errors than did the minimally brain damaged children, and both these groups made more errors than did the normal children. Error scores declined rapidly with age. (CTM)